Is CVE-2025-21333 actively exploited?

CVE-2025-21333 has no public evidence of in-the-wild exploitation as of 2025-11-03.

What is the CVSS score for CVE-2025-21333?

CVE-2025-21333 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2025-21333?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-21333.

Fix CVE-2025-21333 - HIGH microsoft windows 10 21h2

Q: Which products are affected by CVE-2025-21333?

7 products: microsoft windows 10 21h2, microsoft windows 10 22h2, microsoft windows 11 22h2, microsoft windows 11 23h2, microsoft windows 11 24h2, and 2 more.

Description

Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-122NVD-CWE-noinfo

Metadata

Primary Vendor: MICROSOFT
Published: 1/14/2025
Last Modified: 11/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : windows_10_21h2microsoft : windows_10_22h2microsoft : windows_11_22h2microsoft : windows_11_23h2microsoft : windows_11_24h2microsoft : windows_server_2022_23h2microsoft : windows_server_2025

Remediation Guidance

Executive Summary

View on NIST NVD